Technical Information

Stamosens CSM750 / CSS70
Spectral Absorption Coefficient
Analysis system for online evaluation of dissolved organic substances inwastewater

Application

Your benefits

Determination of the spectral absorption coefficient as asignificant parameter. It correlates to common load parameterslike COD and BOD.

• Economy-priced and ecological measuring process:– No sampling or conditioning system required– No chemicals required– Service-friendly design• Measured value preparation in the sensor:– Low interference susceptibility on signal transfer– Very short response time
– In-situ calibration• Recognition of load peaks:– In time– Instantaneous– Without gap• Measured values stored by data logger

Applications are:• Wastewater monitoring for organic substances• Special applications in the UV range measurement

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Stamosens CSM750/CSS70

Function and system design
Measuring principle

The sensor light source transmits an ultraviolet light beam through the medium. The transmission light isdiverted by means of an optical system consisting of mirrors and lenses. The received light is measured by aphotodiode. The part of light absorbed by the medium is proportional to the concentration of the measured
value (see input).
Additionally, a reference beam is measured to compensate interference due to suspended solids and organicsubstances.

Measuring system

A complete measuring system comprises:• a CSM750 transmitter• a CSS70 sensor• an immersion assembly with pendulum frame
Optionally:• Cleaning unit with compressor• Mounting post and weather protection cover

1
ONOFFPOWER

M CEE K2347568910

a0000954

Complete measuring system

212345678910Transmitter CSM750
Weather protection coverCompressor housing (optionally, onlywith cleaning unit)
Mounting post
Power supply
Signal output
Immersion assembly
Pendulum frame
Sensor CSS70
Cleaning unit (optionally)

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Stamosens CSM750/CSS70

Input
Measured variable

Spectral absorption coefficient [m-1]Measuring range

SAC 0-50:
SAC 0-250:
SAC 0-700:

Wavelength

254 nm0 to 50 m-1 resp. 0 to 80 mg/l COD/BOD
0 to 250 m-1 resp. 0 to 400 mg/l COD/BOD
0 to 700 m-1 resp. 0 to 900 mg/l COD/BOD

OutputOutput signal0/4 to 20 mA, galvanically separated

Signal on alarm

2 limit contacts, 1 alarm contact

Contact switching power

230 V AC / 2 A, 30 V DC / 1 A

Loadmax. 500 Ω

Data interface

RS 232 C, slot for bus extension (for internal purposes only)

Power supply
Electrical connection
51509157
DuoVersion:Sensor 1 Sensor 2-33- 30+32+ 29

Shield/31
Schirm28

I1I2
0/4-20 mA

24V DC / 100mA

Terminals voltage to ground even when the unit is switched off !!!
Klemmen führen auch bei ausgeschaltetem Gerät Spannung !!!

Output /Ausgang

23TxD

270V

22RxD

26+24V

21CTS

25+24V

20

GND

240V

19Shield/Schirm

Input /Eingang

Supply / Netz:
80-250 V~

Relais: Load/Last max. 250V~/2A, 30V=/1ANONCCOM

1815

12961714

118

516

131074F132N1

LT 500 mA

Cleaning/ Error/
Hold Alarm 1/ Alarm 2/
GW 2
GW 1
Reinigung Störung

RS232

a0000952

Electrical connection transmitter with power supply 80 to 250 V AC

DuoVersion:Sensor 1 Sensor 2-33- 30+32+ 29Shield/
31Schirm

28I1I20/4-20 mA

24V DC / 100mA

51509391

Supply voltage only 24V DC/AC !!!
Versorgungsspannung nur 24V DC/AC !!!

Output /Ausgang

23270V

22RxD

26+24V

21CTS

25+24V

20GND

240V

19Shield/Schirm

Input /Eingang

RS232

TxD
Relais: Load/Last max. 250V~/2A, 30V=/1ANO
NC
COM

18

15

12

961714

118

516

13

10

7

4

Cleaning/ Error/
Hold Alarm 1/ Alarm 2/
GW 2
GW 1
Reinigung Störung

F132
1LL+T 2A

a0000953

Electrical connection transmitter with power supply 24 V AC/DCNote!
The duo version with a second sensor is not available for the CNM750 and CSM750 transmitters.
Supply voltage

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80 to 250 V AC ±10%, 50/60 Hz
24 V AC/DC3

Stamosens CSM750/CSS70

Power consumption

max. 15 VA

Connection of thecleaning unit

FusePE

L1NPE

Internal wiring

T

1A/230V AC
2A/115V AC

3161812L

NTransmitter

External connections

230V AC / 50Hzor
115V AC / 60Hz

Power supplya0000951-en

Connection of the cleaning unit

Performance characteristics
Response time t90≥ 60 s, selectableMaximum measured error

2 % of upper range value, measurement with potassium hydrogen phthalate (PHP) as standard

Repeatability

0.5 % (with homogeneous media)

Measuring interval≥ 40 s, selectable

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Stamosens CSM750/CSS70

InstallationCaution!
Do not install the sensor suspended from the cable. Use a wall bracket or an immersion assembly withpendulum frame for sensor mounting.
15 (0.59)

Installation instructions

120 (4.72)
70 (2.76)

154 (6.06)
88 (3.43)

100 (3.94)

200 (7.87)

25(0.98)

5.04)

15 (0.59)

Ø1(28mm (inch)

Ø7 x14 (0.28x0.55)a0000927

Wall bracket for sensor

250 (9.84)

2000 (78.74)

mm (inch)

130 (5.12)5055(2 (1.9.17) 7)

Ø 11 (0.43)

130 (5.12)

1/2mm (inch)

R1(2 65.56)

45°

258 (10.16)

Ø 40 (1.57)

a0000904

Immersion assembly for sensor

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a0000903

Pendulum frame for immersion assembly5Stamosens CSM750/CSS70

Weather protection cover andround post mount(accessories, optional)

1500 (59.06)

mm (inch)

120 (4.72)

320 (12.60)

270 (10.63)

450 (17.72)

950 (37.40)

300 (11.81)

mm ( inch)

4 x Ø12 (0.47)a0000928

Weather protection cover CYY101

Cleaning unit

Maximum length of air line tubing:150 (5.91)
a0000929

Round post mount CYY102

15 m (49.2 ft)

Note!
Make sure to observe the maximum length of the air line tubing because the cleaning unit has not sufficient
power for longer distances.

Environment
Ambient temperature–10 to 50 °C (14 to 122 °F)

Ingress protection

Sensor, up to 1 bar (14.5 psi): IP 68
Transmitter: IP 65
Cleaning unit (compressor): IP 54

Process
Medium temperature

2 to 40 °C

Medium pressuremax. 1 bar

Solid content< 2 g/l

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Stamosens CSM750/CSS70

Design, dimensions

115 (4.53)
60 (2.36)

185 (7.28)
60 (2.36)

145 (5.79)
15 (0.59)

241 (9.49)
212 (8.35)

26 (1.02)

Mechanical construction

69 (2.72)

329 (12.95)

145 (5.71)

15 (0.59)

198 (7.80)

198 (7.80)

mm (inch)a0000949

Transmitter dimensions

Ø 127 (5.0)

G1½

323 (12.72)

mm (inch)a0000950

Sensor dimensions

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Stamosens CSM750/CSS70

308 (12.13)

246 (9.69)

332 (13.07)

214 (8.43)

43 (1.69)

mm (inch)

152 (5.98)
a0003231

Compressor of the cleaning unit

WeightTransmitter
Sensorapprox. 1.6 kg (3.5 lb)
approx. 5 kg (11 lb)

Materials

Sensor head
Optical sensor windows
Sensor housing

Stainless steel 1.4571 (AISI 316 Ti)
Quartz glass
POM

Process connection

Sensor head G1½

Cable specification

Cable length:
Cable extension:1)

with CNM750/CNS70

2)with CSM750/CSS70

2 m (6.6 ft), 5 m (16.4 ft), 7 m (23 ft) or 15 m (49.2 ft) (cable with plug)
up to 200 m1) (656 ft) (with sensor connection box, s. accessories)
up to 50 m2) (164 ft) (with sensor connection box, s. accessories)

Note!
If you are using the cleaning unit, make sure to observe the maximum permissible air line tubing length.

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Stamosens CSM750/CSS70

Human Interface
Display and operating
elements

12ON

Meas. value
18.0 1/mOFFPOWER

M CEEK345
a0010557-en

Display and operating elements
12345

LED display
LC display
Operating keys
Indicator LEDs
Mains switch

Certificates and approvals
4 approval

Declaration of conformity
The product meets the requirements of the harmonized European standards. It thus complies with the legal
requirements of the EC directives.
The manufacturer confirms successful testing of the product by affixing the 4 symbol.

Test reports

Quality certificate
Depending on the order code, you receive a quality certificate.
With the certificate the manufacturer confirms compliance with all technical regulations and the successful
individual testing of your product.

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9Stamosens CSM750/CSS70

Ordering information
Product structure

Power supply
789Power supply 80 to 250 V AC
Power supply 24 V AC/DC
Special version acc. to customer specification

Communication / Output
AY

RS 232 + 0/4 to 20 mA
Special version acc. to customer specification

Version1
9One channel version
Special version acc. to customer specification

Additional equipment
AY
CSM750 -Quality certificate
Special version acc. to customer specification
complete order code

Cleaning unit
A
BCY

not selected
230 V
115 V
Special version acc. to customer specification

Measuring range
12390.3 to 50 m-1 resp. 0.4 to 60 mg/l COD, calculated as PHP
15 to 700 m-1 resp. 20 to 900 mg/l COD, calculated as PHP
2 to 250 m-1 resp. 8 to 400 mg/l COD, calculated as PHP
Special version acc. to customer specification

Cable lengthABCDY

2 m (6.56 ft)
7 m (22.97 ft)
5 m (16.41 ft)
15 m (49.22 ft)
Special version acc. to customer specification

Assembly1349

not selected
Sea water version (titanium sensor housing)
Immersion assembly 2 m, 90° offset + pendulum frame with 250 mm wall spacing
Special version acc. to customer specification

Additional equipment
AY
CSS70 -Scope of delivery

10Quality certificate
Special version acc. to customer specification
complete order code

The scope of delivery comprises:• a transmitter (device type and version acc. to the nameplate)• a sensor (sensor type and version acc. to the nameplate)• a quality certificate• Operating Instructions (English).

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Stamosens CSM750/CSS70

Accessories
Note!
In the following sections, you find the accessories available at the time of issue of this documentation.
For information on accessories that are not listed here, please contact your local service.
• Weather protection cover CYY101,for field mounting of the transmitter;order no. CYY101-A• Round post mount CYY102,
for weather protection cover mounting to vertical or horizontal pipes;
order no. CYY102-A• Immersion assembly, offset 45°
length 2 m (6.56 ft); order no. 51511771• Immersion assembly, straightlength 2 m (6.56 ft); order no. 51502959
length 3 m (9.84 ft); order no. 51502960
special length; order no. 50066036• Wall bracket for sensor;
order no. 51508576• Pendulum frame for sensor;
wall spacing 250 mm (9.84"); order no. 51502962
special version; order no. 50066036• Compressor attachment;
order no. 51505419• Cleaning unit,230 V; order no. 51504764
115 V; order no. 51504765

ID 6 (0.24)

mm (inch)c07-cxm750xx-00-00-00-yy-010.cdr

Cleaning unit for sensor• Extension cable,
cable length 10 m (32.8 ft), with plug and coupling;order no. 51502953• Plug,7-pin plug, IP 67;
order no. 51504027• Coupling;order no. 51504025• Control line,
50 m (164 ft), 6 x 0,34;
order no. 51504384• Sensor terminal housing,for cable extension from transmitter to sensor;
order no. 51502956

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Stamosens CSM750/CSS70

75 (2.95)

110 (4.33)

mm (inch)SensorPg 11
a0000944

Sensor terminal housing

a0000945-en

Sensor connection to sensor terminal housing• Flow assembly for drinking water application,with reduction of the dead volume, stainless steel 1.4571 (AISI 316 Ti) / PVDF;
order no. 51509332
without reduction of the dead volume, stainless steel 1.4571 (AISI 316 Ti) / PVDF;
order no. 51509333
60 (2.36)mm (inch)

Ø 6.6 (0.26)

G¼7120)(5.

50(1.97)

160 (6.30)

BA

Ca0000946

Flow assembly
AB

C

Hose connection inlet
ID 1.6 mm (with dead volume reduction)
ID 6.4 mm (without dead volume reduction)
Hose connection inlet
ID 1.6 mm (with dead volume reduction)
ID 6.4 mm (without dead volume reduction)
Split pin for dead volume reduction• Flow vessel,
open version; with inlet and outlet
order no. 51515762

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Stamosens CSM750/CSS70

215 (8.46)

R¾
70 (2.76)

4xØ10 (0.39)

244 (9.61)

150 (5.91)

200 (7.87)

280 (11.02)

40 (1.57)
Ø190 (7.48)mm (inch)a0000943

Flow vessel• Flow assembly, without external rinsing– with dead volume reduction and overpressure protection, order no. 51515803– without dead volume reduction, with overpressure protection; order no. 51515804– PVDF, without dead volume reduction, with stop valves and overpressure protection;order no. 51515765– PVC, without dead volume reduction, with stop valves and overpressure protection; order no. 51515769

DN10G¾130 (5.12)

170 (6.69)

55(2.17)179 (7.05)

7 (0.28)• Flow assembly, with external rinsing
external switched valve needed, inlet DN10, outlet ¾", PVDF
– for 2 mm (0.08") slit, order no. C-A050128-10– for 8 mm (0.31") slit, order no. C-A041217-11– for 40 mm (1.57") slit, order no. C-A041122-11– external switched valve, order no. C-A050110-10170 (2.76) 92 (3.62)

88 (3.46)

2DN10mm (inch)
a0000942

Flow assembly (all versions)
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with external rinsing only, 2 mm (0.08"), 8 mm (0.31") and 40 mm (1.57") slit
with external rinsing only, 40 mm (1.57") slit only

13

Instruments International
Endress+Hauser
Instruments International AG
Kaegenstrasse 24153 Reinach
Switzerland
Tel.+41 61 715 81 00
Fax+41 61 715 25 00
www.endress.com
info@ii.endress.com

TI305C/07/en/06.09
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